The 173 Quad Gate/Multiples is not itself a sound source or pitch sequencer. It’s a utility module that helps route, distribute, and condition signals that are essential for building melodic patches.
In practice, this module helps you make melodies by:
From the manual, the 173 contains two functional sections:
There are 4 gate channels, each with:
This means each channel can act like a voltage-controlled signal gate. A signal enters GATE IN, and whether it appears at GATE OUT depends on the CV applied to the gate control.
This is very useful for melodic patching because it lets you decide when a CV or signal is allowed through.
There are 6 rows of passive multiples, each row with 4 parallel jacks:
This allows one signal to be copied to multiple destinations. Since these are passive multiples, they are best for many CV/audio duties, but precision pitch distribution can sometimes depend on the receiving modules.
So if you feed a standard Eurorack gate or trigger into the control input, the gate will open/close reliably.
Melodic patches usually need three things:
The 173 is especially useful for items 2 and 3, and secondarily for routing pitch CV.
Use a row of the MULTIPLES to send one pitch CV to several modules at once.
Send one sequencer’s pitch CV to:
This lets you build:
Because the multiples are passive, if you are distributing very precise 1V/Oct pitch, check tuning. In many systems it works fine, but buffered multiples are more accurate for critical pitch tracking across multiple oscillators.
Use the MULTIPLES to distribute a gate signal.
One sequencer gate goes to:
This lets multiple voices articulate together, which is useful for:
This is where the 173 gets musically interesting.
A gate channel can be used to pass or block a melodic CV stream.
If you send pitch CV, stepped modulation, or another melodic control signal into GATE IN, and control the gate opening with another rhythm or logic signal into GATE CV, you can create selective melodies.
You have: - a running pitch sequence - a second rhythmic gate pattern
The second pattern opens the gate only on some steps.
Only selected notes pass through, producing: - sparse melodies - rhythmic note omission - evolving motifs
This can create: - broken sequences - rhythmic filtering of melodies - alternating note access - pseudo-generative pitch phrases
Another strong melodic use is to gate a modulation source that affects pitch.
Instead of sending a continuous random CV into your oscillator pitch or quantizer, use the 173 to only let that CV pass at certain moments.
You get notes only when the gate opens, so the random source becomes a more structured melodic source.
This is especially good for: - generative melodies - probabilistic lines - rhythmic pitch changes
While the 173 does not mix or switch between two sources directly, you can use multiple gate channels to control separate melodic streams and combine them downstream if you have another utility module.
This is effective for: - call-and-response - verse/chorus CV structures - alternating arpeggio lines - counterpoint between two oscillators
Use the MULTIPLES to distribute a transposition CV to several places, and use gate channels to let that transposition or melodic modifier affect only certain sections.
The melody changes register or key only when the phrase gate opens.
A melody is not only pitch; articulation shapes melody perception. The 173 can route gates to determine when envelopes happen.
Some notes become accented, brighter, or more dramatic.
This creates: - melodic emphasis - phrase punctuation - dynamic contour
The multiple section is especially helpful here.
If another utility adds intervals, the 173 serves as the central distribution hub.
You can derive: - octaves - fifths - drone-related harmonies - parallel intervals
Think of each gate as a mask over a CV source.
This creates: - conditional melodies - polyrhythmic note appearance - repeating but varied lines - motif fragmentation
Turn a dense sequence into a punchier melodic line.
The pitch changes only on selected rhythmic moments, making the line more syncopated and hook-like.
Use randomness but keep it musical.
Random values become a structured melody determined by the rhythm pattern.
Create a thicker melodic voice.
Two oscillators track the same melody. Detune one slightly or offset one by an interval elsewhere for harmony.
Make a melody evolve across longer sections.
The melody shifts only at phrase boundaries.
The manual notes the gate CV supports inverting (active low) behavior.
This is useful when you want the signal to pass except when a control gate is present, effectively carving out rests or avoiding overlaps.
Whenever that mute pattern goes high, the path closes, creating rests or withheld notes.
This is great for: - anti-accent patterns - syncopated silences - phrase breathing
The 173 becomes much more musically useful when paired with:
Use it to split and condition: - pitch CV - gate lanes - reset pulses
Send gated random/LFO/sequenced voltages into a quantizer to turn utility gating into melody generation.
Distribute one melodic CV to several VCOs for layered voices.
Use multiples for shared timing, and gate channels for selective articulation.
Gate their output before quantization to create controlled generative lines.
Use divided clocks and logic outputs to decide when notes are allowed through.
Multiples distribute the source; gates decide when transposition enters the phrase.
For exact melodic tuning over several oscillators, a buffered multiple may be better.
It needs external: - sequencers - random CV - keyboards - LFOs - quantizers - oscillators
It won’t replace a dedicated sequential switch, logic processor, or precision CV processor, but it is very useful for controlling when melodic voltages are allowed through.
If your goal is melody, this module is best used as:
The Behringer 173 Quad Gate/Multiples helps create melodic components not by generating melodies directly, but by making melodic systems more flexible and playable.
Its strongest melodic uses are:
If you want, I can also turn this into:
1. a set of example patches using specific Behringer System 100 modules, or
2. a “melody recipe” guide showing exact cable connections for a full voice patch.